US1640144A - Mechanism for pressing machines having a start and stop motor - Google Patents

Description

1,640,144 Aug. 23, 1927. J. P- DALY MECHANISM FOR PRESSING MACHINES HAVING A START AND STOP MOTOR Filed Sept. 4, 1924 2 Sheets-Sheet 1 .INVENTORT ATTORNEY.

J. P. DALY Aug. 23 1927.

MECHANISM FOR PRESSING. MACHINES HAVING A START AND STOP MOTOR Filed Sept. 1924 2 Sheets-Sheet 2 A TTORNE Y.

Patented Aug. 23, 1927.

UNITED STATES PATENT OFFICE.

JOSEPH P. DALY,- F SYRACUSE, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE PROSPERITY COMPANY, INC., OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

MECHANISM FOR IPRESSING MACHINES HAVING A START AND STOP MOTOR.

Application filed September 4, 1924. Serial No. 735,819.

This invention relates to pressing machines as garment and laundry pressing machines and particularly to power presses which are actuated by a start and stop motor and has for its object a particularly simle and efficient means by which the mot-or is started and develops momentum before the load or work of actuating the machine is thrown thereon.

The invention consists in the novel features and in the combinations and constructions hereinafter'set forth and claimed and described.

In describing this invention, reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is a side elevation of a pressing machine embodying my invention.

Figure 2 is an enlarged sectional view of the. controlling means, the same being taken approximately on line 22, Figure 1.

Figure 3 is a detail face view of the cam ring and contiguous part-s.

Figure 4 is a detail View of the controller brush.

Thispressing machine comprises generally cooperating pressing elements, one of which is movable toward and from the other, means for actuating the movable element including a start and stop motor, motion transmitting means actuated by the motor and normally disconnected therefrom, means for controlling the flow of current through the motor including a manually operable switch, operating means for controlling the connecting and disconnecting of the motion transmitting connections and the motor, manualmeans connected to both of said operating means to operate the switch to close the current through the motor and hence start the motor in advance of the time the motion transmitting connections are connected to the motor, so that the motor has started and developed momentum and power before the work of operating the machine is thrown thereon. I

I have here illustrated my invention as embodied in the conventional type of press- 50 ing machine, including cooperating pressing elements as a buck 1 suitably supported on a frame 2 and a pressing element or head 3 movable toward and from the buck 1. The

head 3 is shown as carried on theforward arm of av vertically movable lever or yoke 4 pivoted at 5 to a standard 6 rising from the frame 2.

7 designates the start and stop motor.

The motion transmitting means between the motor and the head 3 in addition to the yoke 4 comprises an intermittently rotatable shaft 8 mounted in suitable bearings 9 and having a crank 10, a. connecting rod 11 connecting the crank 10 and a toggle consisting of links 12 and 13 pivoted together at 14 and pivoted respectively at 15 and 16 to the rear arm of the lever 4 and to the frame 2. The shaft 8 is usually connected to the motor through a driving member as a worm wheel 17 mounted on the shaft to rotate about the same and meshing with, a worm. 19 mounted on a shaft 20 connected by a coupling 21 to the armature shaft 22 of the motor. The worm wheel 17 is'normally disconnected from the shaft 8 and is connected thereto by suitable mechanism after the motor has started.

The mechanism here illustrated includes a shiftable clutch section 23 slidable axially on the shaft into and out of engagement with a clutch section 24 associated with the worm wheel 17 and shiftable into its clutching position by a spring 25. The clutch section 23 is normally held out of-clutching position by manually shiftable holding means here shown as wedges or cams 26 movable radially crosswise of an annular track or ring 27 and projecting above the face of the track, the wedges ,or cam-s and the track coasting with followers as rollers 28 on the clutch section 23. As the shaft makes a half revolution, there are two cams 26 arranged diametricallyopposite each other' and two followers 28. Normally the followers are engaged with the cams, so that the clutch section 23 is held in its out position, but when the cams are shifted radially out of line with the track 27, the clutch 23 is free to be shifted inwardly by the spring into engagement with the clutch section 24 fixed to the Wheel 17, so that the shaft 8 will be rotated until the followers again engage the cams 26, these cams being movable automatically back into operative position, after they have been manually shifted out of operative position to permit the clutch to en- Leeann gage. During'the rotation of the clutch sec-the segments or brush portions 41, 42 or is tion 23, the followers 28 ride on. the track or ring 27 j The worm 19 and worm wheel 17 are mounted in a suitable housing 29 and the annular clutch section 23 and associated parts are mounted in a housing 30 secured as by screws 31 to the housing 29.

The circuit through the motor is controlled. by a suitable switch member 32 m'ovable'into and out of engagement with the contact 33 andwhen the switch 32 is closed, the motor is energized and the circuit is maintained during each intermittent operation of the shaft 8 after the motor has been started and the switch 32 again opened, by a rotarycontroller 39 mounted concentric with ,the shaft 8 in the housing 30. After the shaft 8 makes a half revolution, the circuit through the motor is broken by the controller.

This operation of the motor as well as the general construction of the machine, with the exception of the clutch 23 or the combination of a clutch or other connecting means with the motor, forms no part of this inventionand for a similar construction and operation of a switch and controller for pressing machines, see patent to Andree No. 1,379,601, May 24, 1921. g

The switch 32 and the controller also act to energize a magnet 35 to release a brake band 36 encircling the fly wheel of the motor, the brake band being normally held on to the fly wheel by a spring. \Vhen the magnet is energized, the brake is released and when it is de-energized, as at the end of each intermittent operation of the shaft 8, the brake is applied by its spring to the fly wheel to stop the motor. This brake mechanism forms no part of this invention and in so far as this invention is concerned it may be dispensed with. v v

The controller switch here shown comprises a body or disk of insulated material 38 mounted on the shaft 8 within the housing30 and having a. brush designated generally 39, this brush having a central portion 40 which is attached to the disk 38 and offset brush portions 41 and 42. These brush portions coact with a set of terminals 43 and 44 located diametrically opposite each other and the brush portions are separated at diametrically opposite points, at 45 and 46. The terminals 43 and 44 are con- ,nected to close the current through the motor after the motor has been started by the closing of the switch 32, and the switc 1 32 again opened. There is an additional set provided with gaps similar to the gaps 45,46.

The switch 32 is operated manually as by a rod 49 having a handle 50 at its front end and connected at its rear end to one arm of a lever 51, the other arm of which is connected by a link 52 to the switch arm 32., Upon movement of the rod 49' rearwardly, obviously, the switch 32 will be closed and is opened when the operator releases his hold on the handle 50 by any suitable spring means. The cams or wedges 26 are also operated from this handle 50 through suitable connections including a lost motion connection which permits the switch 32 to be closed in advance of the operation or withdrawal of the cams 26 to permit the clutch section 23 to engage the clutch section 24.

These connections as here shown include a lever as a bell crank lever 53 pivoted at 54 to the frame, one arm of the lever coacting with a shoulder 55 on the rod 49 and the other arm being connected by link 56 to one arm 57 of a bell crank lever 58 pivoted at 59 in the housing 30. The other arm of this bell crank lever is connected at 60 to one of the wedges 26. This wedge 26 is connected to the other wedge by a link 61 here shown as annulus and extending around the clutch section 23, the link being pivoted at 62 and 63 to the wedges v26. A suitable spring 64 is connected to the angle lever 57 to hold it in its normal position and the link 56 is connected to the arm 57 of the angle lever-58 by a lost motion connection as a pin and slot connection at 65. The spring 64 acts as a returning spring.

The crank 10 and link 11 are in a dead center line at the beginning and the end of each operation and when the head is under pressure, a. great load is thrown upon the motor as the pressure tends to hold the toggle links 12 and 13 in a straight line and comparatively great power is required to start the breaking thereof, and when a start and stop motor is used, some sort of an operator-operated trip pedal is used to relieve the pressure on the straightened toggle links in order that they may be folded or broken. Also excessive power is required when the pressure is being applied and the toggle links moved from nearly straightened into straightened position.

In operation, assuming the ress is closed, as shown in Figure 1, upon t e pressing of the handle 50 nearwardly, the switch 32 is closed thereby closing the circuit through the motor and the motor started. The motor gains full momentum before the lost motion is taken up at the pin and slot connection 65, F igure 2. When this lost motion is taken up, the wedges 26 are moved out from underthe followers 28 permitting the- 23 into engagement with the clutch section 24 on the wheel 17 and hence cause the shaft 8 to be clutched to the motor after it has gained its momentum.

At the starting of each half revolution of the shaft 8, the terminals 43 are in the spaces 45 between the ends of the brush portions 41 and 42. ,Upon initial rotation of the shaft 8 and hence of the controller disk 38 and after the clutch engages, these terminals 43 engage the brush portions 41 and 42 and maintain the circuit through the motor until the terminals again come into the spaces 45 and 46.

The spring 64 returns the wedges to their normal position in line with the track 27 after the handle has been released and also returns the handle to its starting position and hence effects the opening of the switch 32, although additional springs may be provided if necessary.

What I claim is z 1. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, means for actuating the movable element including a start and stop motor, an intermittently rotatable shaft normally disconnected from the motor, motion transmitting means between the shaft and the movable element, a switch for closing the circuit through the motor, manually operable means for closing the switch, and an automatically operable controller movable with the shaft to maintain the circuit closed through the motor and break the circuit atthe end of each intermittent operation and means controlled by said manually operable means for connecting the shaft to the motor after the switch has been closed and the motor started.

2.. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, means for actuating the movable element, including a start and stop motor, an intermittently rotatable shaft, motion transmitting means between the shaft and the movable element, a switch for closing the circuit through the motor, manually controlled means for closing the switch, and an automatically operable controller movable with the shaft to maintain the circuit closed through the motor and break the circuit at the end of each intermittent operation, means operable to connect and disconnect the shaft and the motor at the end. of'each intermittent operation, and motion transmitting connections between the last mentioned means and the manually controlled means, said connections includin a lost motion device, whereby the manual v controlled means is operated to first close the circuit through the motor and then connect the shaft to the motor,

3. In a pressing machine, the combination of cooperating pressing elements, one of which is. movable toward and from the other, means for actuating the movable element, comprising an intermittently rotatable shaft and motion transmitting connections between the shaft and the movable element, a start and stop motor for actuating the shaft, and normally disconnected therefrom, a switch for initially closing the circuit throughthe motor, manual means for operating the switch, an automatic controller movable with the shaft to maintain the circuit closed through the motor during each intermittent operation of the shaft and to break the circuit at the end of each intermittent operation, a clutch for connecting the motorand the shaft, including a shiftable clutch section, means tending to thrust the clutch section into its in position, and means for holding it in its out position, means for shifting the holding means into and out of its operative position,

and motion transmitting connections between said shifting means and the manually operated means for the switch.

4. In a pressing machine, thecombination of cooperating pressing elements, one of which is movable toward and from the other, means for actuating the movable element, comprising an intermittently rotatable shaft and motion transmitting connections between the shaft and the movable element, a startand stop motor for actuating the shaft and normally disconnected therefrom, a switch for initially closing the circuit through the motor, manual means for operating the switch, an automatic controller movable with the shaft to maintain the circuit closed through the motor during each intermittent operation of the shaft and break the circuit at the end of each intermittent operation, manual means for operating the switch, a clutch for connecting the motor and the shaft, including ashiftable clutch section, means tending to thrust the clutch section into its in position and means for holding it in its out position,-1neans for shifting the holding means into and out of its operative position, and motion transmitting connections between said shifting means and the manual means for the switch, said connections including a lost motion device, whereby the manuall operated means closes the circuit through t e motor in advance of the shifting of said holding means out of operative position.

5. In a pressing machine, the combination of cooperating pressing elements, one of which is movable toward and from the other, means for actuating the movable element, including an intermittently rotatable shaft, a driving member mounted on the shaft and rotatable about the same, a clutch section associated with the driving member,

a shiftable clutch section normally out of engagement with the former clutch section, and being mounted on theshaftand shift.- able axially thereof, a spring tending to shift it into engagement with the former clutch section, an annular track arranged concentric with the shaft, followers associated with the track, radially movable cams projecting above the surfaces of the track, and being normally engaged with the fol lowers to hold the clutch out, operating means for shifting the cams, a start and stop motor connected to the driving member, means for controlling the starting, the actuation and the stopping of the motor, including a normally open switch, manual means, connections between the manual means and the switch, additional connections between the manual means and the operating means for the cams, said additional connections including a lost motion device, and a returning spring acting on the manual means.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and in the State of New York, this 20th day of August, 1924.

JOSEPH P. DALY.

Images